Examples with XMLFilterImpl org.xml.sax.helpers.XMLFilterImpl used on opensource projects

Example 6 with XMLFilterImpl

use of org.xml.sax.helpers.XMLFilterImpl in project ddf by codice.

the class XsltMetacardTransformer method transform.

@Override
public BinaryContent transform(Metacard metacard, Map<String, Serializable> arguments) throws CatalogTransformerException {
    LOGGER.debug("Entering metacard xslt transform.");
    Transformer transformer;
    Map<String, Object> mergedMap = new HashMap<String, Object>(localMap);
    if (arguments != null) {
        mergedMap.putAll(arguments);
    }
    // adding metacard data not in document
    mergedMap.put("id", getValueOrEmptyString(metacard.getId()));
    mergedMap.put("siteName", getValueOrEmptyString(metacard.getSourceId()));
    mergedMap.put("title", getValueOrEmptyString(metacard.getTitle()));
    mergedMap.put("type", getValueOrEmptyString(metacard.getMetacardType()));
    mergedMap.put("date", getValueOrEmptyString(metacard.getCreatedDate()));
    mergedMap.put("product", getValueOrEmptyString(metacard.getResourceURI()));
    mergedMap.put("thumbnail", getValueOrEmptyString(metacard.getThumbnail()));
    mergedMap.put("geometry", getValueOrEmptyString(metacard.getLocation()));
    ServiceReference[] refs = null;
    try {
        LOGGER.debug("Searching for other Metacard Transformers.");
        // TODO INJECT THESE!!!
        refs = context.getServiceReferences(MetacardTransformer.class.getName(), null);
    } catch (InvalidSyntaxException e) {
    // can't happen because filter is null
    }
    if (refs != null) {
        List<String> serviceList = new ArrayList<String>();
        LOGGER.debug("Found other Metacard transformers, adding them to a service reference list.");
        for (ServiceReference ref : refs) {
            if (ref != null) {
                String title = null;
                String shortName = (String) ref.getProperty(Constants.SERVICE_SHORTNAME);
                if ((title = (String) ref.getProperty(Constants.SERVICE_TITLE)) == null) {
                    title = "View as " + shortName.toUpperCase();
                }
                String url = "/services/catalog/" + metacard.getId() + "?transform=" + shortName;
                // define the services
                serviceList.add(title);
                serviceList.add(url);
            }
        }
        mergedMap.put("services", serviceList);
    } else {
        LOGGER.debug("No other Metacard transformers were found.");
    }
    // TODO: maybe add updated, type, and uuid here?
    // map.put("updated", fmt.print(result.getPostedDate().getTime()));
    // map.put("type", card.getSingleType().getValue());
    BinaryContent resultContent;
    StreamResult resultOutput = null;
    XMLReader xmlReader = null;
    try {
        XMLReader xmlParser = XMLReaderFactory.createXMLReader();
        xmlParser.setFeature("http://xml.org/sax/features/external-general-entities", false);
        xmlParser.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
        xmlParser.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
        xmlReader = new XMLFilterImpl(xmlParser);
    } catch (SAXException e) {
        LOGGER.debug(e.getMessage(), e);
    }
    Source source = new SAXSource(xmlReader, new InputSource(new StringReader(metacard.getMetadata())));
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    resultOutput = new StreamResult(baos);
    try {
        transformer = templates.newTransformer();
    } catch (TransformerConfigurationException tce) {
        throw new CatalogTransformerException("Could not perform Xslt transform: " + tce.getException(), tce.getCause());
    }
    if (!mergedMap.isEmpty()) {
        for (Map.Entry<String, Object> entry : mergedMap.entrySet()) {
            LOGGER.debug("Adding parameter to transform {}:{}", entry.getKey(), entry.getValue());
            transformer.setParameter(entry.getKey(), entry.getValue());
        }
    }
    try {
        transformer.transform(source, resultOutput);
        byte[] bytes = baos.toByteArray();
        IOUtils.closeQuietly(baos);
        LOGGER.debug("Transform complete.");
        resultContent = new XsltTransformedContent(bytes, mimeType);
    } catch (TransformerException te) {
        throw new CatalogTransformerException("Could not perform Xslt transform: " + te.getMessage(), te.getCause());
    } finally {
    // TODO: if we ever start to reuse transformers, we should add this
    // code back in
    // transformer.reset();
    }
    return resultContent;
}